听众信箱：西方传教士主编中国历法. VOA Chinese, May 16, 2010.
http://www1.voanews.com/chinese/news/china/JESUIT_CHINESE_CALENDAR_20100515-93854074.html
Note:
(a) Johann Adam Schall von Bell (1591-1666)
(b) Matteo Ricci (1552-1610; an Italian Jesuit priest)
(c) 崇祯皇帝 the Chongzhen emperor
(d) 摄政王 多尔衮 Regent Dorgon
(e) 顺治皇帝 the Shunzhi emperor
(f) 南怀仁 Ferdinand Verbiest (1623-1688; a Flemish Jesuit missionary--that
part of Flanders in modern-day Belgium)
http://en.wikipedia.org/wiki/Ferdinand_Verbiest
(Section 1.2 "Astronomy contests")
(g) 时宪历 Shi Xian calendar